<template>
  <div id="root">
  <div class="todo-container">
    <div class="todo-wrap">
      <MyHeader @receive="receive" />
      <MyList :todos="todos"/>
      <MyFooter :todos="todos" @checkAllApp="checkAllApp" @clearAllApp="clearAllApp"/>
    </div>
  </div>
</div>

</template>

<script>
import MyHeader from './components/MyHeader.vue'
import MyFooter from './components/MyFooter.vue'
import MyList from './components/MyList.vue'

export default {
  name: 'App',
  components: {
    MyHeader,
    MyFooter,
    MyList
  },
  data(){
      return{
        todos:JSON.parse(localStorage.getItem('todos')) || []
      }
  },
  methods:{
    receive(todo){
      this.todos.unshift(todo)
    },
    changeCheck(id){
      this.todos.forEach((t)=>{
        if(t.id===id) t.done=!t.done
      })
    },
    deleteTodo(id){
      this.todos = this.todos.filter((t)=>{
        return t.id!==id
      })
    },
    checkAllApp(value){
      this.todos.forEach((t)=>{
        t.done = value
      })
    },
    clearAllApp(){
      this.todos = this.todos.filter((t)=>{
        return !t.done
      })
    },
    updateTodo(id,value){
      this.todos.forEach((t)=>{
        if(t.id === id){
          t.name = value
        }
      })
    }
  },
  watch:{
    todos:{
      deep:true,
      handler(value){
        localStorage.setItem('todos',JSON.stringify(value))
      }
    }
  },
  mounted(){
    this.$bus.$on('changeCheck',this.changeCheck)
    this.$bus.$on('deleteTodo',this.deleteTodo)
    this.$bus.$on('updateTodo',this.updateTodo)
  },
  beforeDestroy(){
    this.$bus.$off('changeCheck')
    this.$bus.$off('deleteTodo')
    this.$bus.$off('updateTodo')
  }
}
</script>
<style>

  /*base*/
  body {
    background: #fff;
  }

  .btn {
    display: inline-block;
    padding: 4px 12px;
    margin-bottom: 0;
    font-size: 14px;
    line-height: 20px;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
    border-radius: 4px;
  }

  .btn-danger {
    color: #fff;
    background-color: #da4f49;
    border: 1px solid #bd362f;
  }

  .btn-edit {
    color: #fff;
    background-color: skyblue;
    border: 1px solid rgb(62, 114, 131);
    margin-right: 5px;
  }

  .btn-danger:hover {
    color: #fff;
    background-color: #bd362f;
  }

  .btn:focus {
    outline: none;
  }

  .todo-container {
    width: 600px;
    margin: 0 auto;
  }
  .todo-container .todo-wrap {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
  }
</style>


